Results 41 to 50 of about 33,597 (156)

Precision Weak Gravitational Lensing Using Velocity Fields: Fisher Matrix Analysis [PDF]

Astrophysical Journal, 2019
Weak gravitational lensing measurements based on photometry are limited by shape noise: the variance in the unknown unlensed orientations of the source galaxies.
D. Wittman, M. Self
semanticscholar   +1 more source

$f(R)$ gravity theories in the Palatini Formalism constrained from strong lensing [PDF]

, 2009
$f(R)$ gravity, capable of driving the late-time acceleration of the universe, is emerging as a promising alternative to dark energy. Various $f(R)$ gravity models have been intensively tested against probes of the expansion history, including type Ia ...
Amarzguioui, Amendola, Armendariz-Picon, Armendariz-Picon, Astier, Borowiec, Browne, Caldwell, Caldwell, Capozziello, Capozziello, Capozziello, Carroll, Carvalho, Chae, Chae, Chae, Chen, Chen, Chiba, Choi, Cole, Copeland, Da-Ming Chen, Dabrowski, Dave, de Bernardis, Eisenstein, Erickcek, Fay, Hinshaw, Hopkins, Huterer, Im, Inada, Kamenshchik, Keeton, Keeton, Kochanek, Kochanek, Kochanek, Koivisto, Koopmans, Koopmans, Li, Li, Li, Li, Li, Li, Mao, Maoz, Mitchell, Moller, Navarro, Nojiri, Nojiri, Ofek, Oguri, Oguri, Oguri, Oguri, Olmo, Olmo, Page, Perlmutter, Richards, Riess, Riess, Riess, Rix, Rusin, Santos, Sarbu, Seljak, Sotiriou, Sotiriou, Sotiriou, Spergel, Spergel, Tegmark, Tegmark, Vollick, Weinberg, Wu, Wu, Wu, Wu, Wyithe, Xin-Juan Yang, Zhang, Zhu, Zhu   +92 more
core   +5 more sources

Roulettes: a weak lensing formalism for strong lensing: I. Overview [PDF]

, 2016
We present a new perspective on gravitational lensing. We describe a new extension of the weak lensing formalism capable of describing strongly lensed images.
C. Clarkson
semanticscholar   +1 more source

Influence of the local Universe on weak gravitational lensing surveys [PDF]

Monthly notices of the Royal Astronomical Society, 2018
Observations of the large-scale structure (LSS) implicitly assume an ideal Friedmann-Lemaitre-Robertson-Walker (FLRW) observer with the ambient structure having no influence on the observer.
R. Reischke, B. Schäfer, K. Bolejko, G. Lewis, M. Lautsch   +4 more
semanticscholar   +1 more source

Image simulations for gravitational lensing withskylens [PDF]

Monthly notices of the Royal Astronomical Society, 2018
We present the latest version of the ray-tracing simulation code SKYLENS, which can be used to develop image simulations that reproduce strong lensing observations by any mass distribution with a high level of realism.
A. Plazas, A. Plazas, M. Meneghetti, M. Maturi, J. Rhodes, J. Rhodes   +5 more
semanticscholar   +1 more source

Magnification relations for Kerr lensing and testing Cosmic Censorship [PDF]

, 2007
A Kerr black hole with mass parameter m and angular momentum parameter a acting as a gravitational lens gives rise to two images in the weak field limit.
A. O. Petters, A. O. Petters, B. O’Neill, M. C. Werner, P. Schneider, R. Penrose, S. Chandrasekhar   +6 more
core   +1 more source

An Exact Universal Gravitational Lensing Equation

, 1998
We first define what we mean by gravitational lensing equations in a general space-time. A set of exact relations are then derived that can be used as the gravitational lens equations in all physical situations.
A. Einstein, Ezra T. Newman, L. Landau, L. Landau, P. Schneider, Simonetta Frittelli, Simonetta Frittelli, Thomas P. Kling, V. I Arnold, V. I Arnold, V. I. Arnold   +10 more
core   +2 more sources

Generalized model-independent characterization of strong gravitational lenses V: reconstructing the lensing distance ratio by supernovae for a general Friedmann universe [PDF]

Monthly notices of the Royal Astronomical Society, 2018
We determine the cosmic expansion rate from supernovae of type Ia to set up a data-based distance measure that does not make assumptions about the constituents of the universe, i.e.
J. Wagner, Sven Meyer
semanticscholar   +1 more source

The inner mass power spectrum of galaxies using strong gravitational lensing: beyond linear approximation [PDF]

, 2017
In the last decade, the detection of individual massive dark matter sub-haloes has been possible using potential correction formalism in strong gravitational lens imaging.
S. Chatterjee, L. Koopmans
semanticscholar   +1 more source

Angular diameter distances reconsidered in the Newman and Penrose formalism

, 2016
Using the Newman and Penrose spin coefficient (NP) formalism, we provide a derivation of the Dyer-Roeder equation for the angular diameter distance in cosmological space-times.
Aly, Aly, Kling, Thomas P.
core   +1 more source